Okay, this could be a case of me missing something that's really blindingly obvious, but I need some help please!! XD

I can't for the life of me figure out how to add more photos to a costume once I'm past the initial 'add costume' screen. I added my Yuffie costume after Amecon but I now want to go and add some photos from Expo. I can't find an 'upload more photos' button anywhere though, and the feature seems to be missing from the 'edit costume' screen!!

Seriously, I spent about half an hour trying to figure this out last night before giving up and doing my competition entry instead. :/ That could have just been because I felt reeeaaallly tired and braindead though ...